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View Full Version : 4-DD515, DD M1c, 2005 Denali



Canaan
03-02-2014, 12:32 AM
Well, here is the start of this build.

Just a port for now. Continues tomorrow. Install Monday/Tuesday.

http://i111.photobucket.com/albums/n151/southern1inla/20140301_153550_zpsihnbjaza.jpg (http://s111.photobucket.com/user/southern1inla/media/20140301_153550_zpsihnbjaza.jpg.html)

http://i111.photobucket.com/albums/n151/southern1inla/20140301_153540_zpshfgdb0x7.jpg (http://s111.photobucket.com/user/southern1inla/media/20140301_153540_zpshfgdb0x7.jpg.html)

Dimwit
03-02-2014, 12:33 AM
Already looking forward to this build haha

soundstreamer
03-02-2014, 11:57 AM
That's an awesome port. Wall or window line?

4bannger
03-02-2014, 06:28 PM
that port is insane. how are thoses made. what kind of angel do you cut on each end. 22.5?

ducatipaso
03-02-2014, 10:52 PM
That octagon is clutch and I bet you had it in a submission hold when you were tapping it out with that brad nailer.

Canaan
03-03-2014, 02:35 AM
An octagon is actually pretty easy to make, if you have the right tools and a second set of hands.

The angles are 22.5deg, I use a Wixey digital angle gauge (best $40 you can ever spend for a table saw accessory).
This port is 196sq inches, 6.375" internal, 7" external cuts. With a good saw, just set the gate and make 8 cuts.

I hold the pieces one-by-one in place and have my co-worker Jay pop a brad 2" from the top and 2" from the bottom on each panel.
Then ratchet strap it together over night, its solid as a rock. The glue holds it, not the brads.

I'll post pics tomorrow showing that the sides are square.
Should have the box finished then.

Canaan
03-04-2014, 12:09 AM
The port is solidly square.

http://i111.photobucket.com/albums/n151/southern1inla/20140303_134058_zpsltjupftj.jpg (http://s111.photobucket.com/user/southern1inla/media/20140303_134058_zpsltjupftj.jpg.html)

http://i111.photobucket.com/albums/n151/southern1inla/20140303_134109_zpsrwp6blms.jpg (http://s111.photobucket.com/user/southern1inla/media/20140303_134109_zpsrwp6blms.jpg.html)

http://i111.photobucket.com/albums/n151/southern1inla/20140303_134140_zpshd35xlvd.jpg (http://s111.photobucket.com/user/southern1inla/media/20140303_134140_zpshd35xlvd.jpg.html)



Port attached to the front panel and routered out.
http://i111.photobucket.com/albums/n151/southern1inla/20140303_142954_zpsekh1fyyl.jpg (http://s111.photobucket.com/user/southern1inla/media/20140303_142954_zpsekh1fyyl.jpg.html)

Rear wall and baffle bracing. 2.5 x 1.5" baffle brace (connects to side wall) and 6" wedge for the back wall.
http://i111.photobucket.com/albums/n151/southern1inla/20140303_170951_zpscrxcfkap.jpg (http://s111.photobucket.com/user/southern1inla/media/20140303_170951_zpscrxcfkap.jpg.html)

I ran out of paint for the port, but here is a nearly finished shot.
http://i111.photobucket.com/albums/n151/southern1inla/20140303_174133_zpsqj6ox5dx.jpg (http://s111.photobucket.com/user/southern1inla/media/20140303_174133_zpsqj6ox5dx.jpg.html)

I will finish the paint and carpet the box in the morning.

Canaan
03-05-2014, 09:38 PM
Completed pics of this box.

http://i111.photobucket.com/albums/n151/southern1inla/20140305_100530_zpsh8mwmtom.jpg (http://s111.photobucket.com/user/southern1inla/media/20140305_100530_zpsh8mwmtom.jpg.html)

http://i111.photobucket.com/albums/n151/southern1inla/20140305_100609_zps38p32uxl.jpg (http://s111.photobucket.com/user/southern1inla/media/20140305_100609_zps38p32uxl.jpg.html)

http://i111.photobucket.com/albums/n151/southern1inla/20140305_100626_zpspusczk7y.jpg (http://s111.photobucket.com/user/southern1inla/media/20140305_100626_zpspusczk7y.jpg.html)

http://i111.photobucket.com/albums/n151/southern1inla/20140305_100621_zpsddyudoxz.jpg (http://s111.photobucket.com/user/southern1inla/media/20140305_100621_zpsddyudoxz.jpg.html)

gckless
03-05-2014, 09:48 PM
Holy giant ports batman. How much area per cube?

Canaan
03-06-2014, 03:30 AM
Holy giant ports batman. How much area per cube?

I know this port looks HUGE, but it was actually 196sq inches of port area for at 14.5cuft (net) box.
So the port area per cubic foot was just 13.5sq/cuft.!!!

But, this is a 4-DD 515 build with only 1500wrms. Port noise will NEVER HAPPEN at that level of cone displacement.

The actual 'on paper' numbers for this build were ~14.5cuft @ 38hz. But 'in-cabin' tuning changes alot with big box builds, and I accounted for that change in my design (port firing into the back hatch and the distance to the listening position)

This box build is heavily braced...and I offered the owner the chance to replace the subs, add batts, alts, and a second DD M1c....to get louder.




I just have to say, the owner of this vehicle was stunned after hearing what he had purchased.
I wish I had taken a vid of his reaction....if the owner drops by soon, I will video his review for this install.







also...round ports are more efficient.
Slot-vents are ok, but a round vent is the most efficient vent (for tuning).

Louisiana_CRX
03-19-2014, 09:40 PM
Looks good ...

DB-Audio
03-20-2014, 08:40 PM
that is sick